In llvm-mc parse a Hash token as a full line comment. Allows handling of

preprocessed .s files and matches darwin gas.  rdar://8798690
Also fix a comment on the next line of AsmParser.cpp after this new code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122531 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 15 insertions, 2 deletions

diff --git a/lib/MC/MCParser/AsmParser.cpp b/lib/MC/MCParser/AsmParser.cpp
index 2f53b21..aac5535 100644
--- a/lib/MC/MCParser/AsmParser.cpp
+++ b/lib/MC/MCParser/AsmParser.cpp
@@ -831,12 +831,17 @@ bool AsmParser::ParseStatement() {
     return false;
   }
 
-  // Statements always start with an identifier.
+  // Statements always start with an identifier or are a full line comment.
   AsmToken ID = getTok();
   SMLoc IDLoc = ID.getLoc();
   StringRef IDVal;
   int64_t LocalLabelVal = -1;
-  // GUESS allow an integer followed by a ':' as a directional local label
+  // A full line comment is a '#' as the first token.
+  if (Lexer.is(AsmToken::Hash)) {
+    EatToEndOfStatement();
+    return false;
+  }
+  // Allow an integer followed by a ':' as a directional local label.
   if (Lexer.is(AsmToken::Integer)) {
     LocalLabelVal = getTok().getIntVal();
     if (LocalLabelVal < 0) {
diff --git a/test/MC/AsmParser/full_line_comment.s b/test/MC/AsmParser/full_line_comment.s
new file mode 100644
index 0000000..4c91986
--- /dev/null
+++ b/test/MC/AsmParser/full_line_comment.s
@@ -0,0 +1,8 @@
+// RUN: llvm-mc -triple arm-apple-darwin10 %s | FileCheck %s
+# this is a full line comment starting at column 1
+ # this starting at column 2
+
+        .data
+// CHECK: .long 0
+.long 0
+# .long 1 this line is commented out